---
title: "Explain the difference between controlled and uncontrolled components in React forms."  
description: "Explain the difference between controlled and uncontrolled components in React forms."  
author: "Steilla Mitchel"  
published: 2023-10-05  
updated: 2023-10-06  
canonical: https://www.mindstick.com/forum/160042/explain-the-difference-between-controlled-and-uncontrolled-components-in-react-forms  
category: "React js"  
tags: ["javascript", "reactjs", "reactjs development"]  
reading_time: 3 minutes  

---

# Explain the difference between controlled and uncontrolled components in React forms.

[Explain the difference](https://www.mindstick.com/forum/156125/can-you-explain-the-difference-between-organic-and-paid-results) between [controlled and uncontrolled components](https://www.mindstick.com/forum/161429/describe-the-difference-between-controlled-and-uncontrolled-components-in-react) in [React](https://www.mindstick.com/articles/327892/react-why-it-just-makes-sense-for-web-development) forms.

## Replies

### Reply by Aryan Kumar

[Controlled](https://yourviews.mindstick.com/view/81837/has-pakistan-controlled-corona-pandemic) and uncontrolled [components](https://www.mindstick.com/blog/74096/understanding-the-role-of-some-integral-ac-components) in React forms are two different approaches for managing form input fields and their state. They have distinct characteristics and use cases, and understanding the [difference](https://www.mindstick.com/articles/157114/good-news-or-bad-news-and-the-difference-is) is essential when working with forms in React.

**Controlled Components**:

**State Management**: In controlled components, the component's state (usually within the component's **state** or using a state management library like Redux) controls the value of the form input fields.

**Data Flow**: The value of the input fields is bound to the component's state, so any change in the input field triggers a state update, which then causes the component to re-render with the updated value.

**Example**:

```plaintext
class ControlledForm extends React.Component {
  constructor() {
    super();
    this.state = {
      inputValue: '',
    };
  }

  handleChange = (event) => {
    this.setState({ inputValue: event.target.value });
  };

  render() {
    return (
      <input
        type="text"
        value={this.state.inputValue}
        onChange={this.handleChange}
      />
    );
  }
}
```

**Advantages**:

- Full control over the input value and its behavior.
- Enables validation, conditional rendering, and other custom logic based on the input value.

**Disadvantages**:

- More code is required to manage the state and events.
- Slower updates as the entire component re-renders on each input change.

**Uncontrolled Components**:

**State Management**: In uncontrolled components, the form input fields maintain their state internally, without being directly controlled by React's state.

**Data Flow**: React doesn't directly manage or update the input field's value. Instead, you rely on references (refs) to access the field's value when needed.

**Example**:

```plaintext
class UncontrolledForm extends React.Component {
  constructor() {
    super();
  }

  handleSubmit = (event) => {
    event.preventDefault();
    console.log(this.inputRef.value);
  };

  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <input type="text" ref={(input) => (this.inputRef = input)} />
        <button type="submit">Submit</button>
      </form>
    );
  }
}
```

**Advantages**:

- Simpler and less verbose code for basic forms.
- Faster updates as React doesn't need to re-render on every input change.

**Disadvantages**:

- Limited control and access to the input field's value, which can be challenging for advanced features like validation and conditional rendering.
- Can make it harder to test and debug because the input value is not directly accessible through React state.

**Which to Choose**:

Use controlled components when you need fine-grained control over the form input and when you want to manage and validate the input value extensively.

Use uncontrolled components when you need a simpler approach for basic forms, and you don't require extensive control over the input value.

In many cases, you may find yourself using a combination of both controlled and uncontrolled components within the same form, depending on the complexity of the form and the specific requirements of each input field.


---

Original Source: https://www.mindstick.com/forum/160042/explain-the-difference-between-controlled-and-uncontrolled-components-in-react-forms

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